The seed or fecundating fluid of male animals; sperm. It is a white or whitish viscid fluid secreted by the testes, characterized by the presence of spermatozoids to which it owes its generative power.

Semen contra, ∨ Semen cinae or cynae, a strong aromatic, bitter drug, imported from Aleppo and Barbary, said to consist of the leaves, peduncles, and unexpanded flowers of various species of Artemisia; wormseed.